Wraith Form said:Is there a product that describes how one might pare down polytheistic pantheons down to a monotheistic one (or possibly a small number of gods), but still "fuels" various clerics / priests / holy persons?
The Player's Handbook provides all the rules you need for this. Just choose what domains you want available and a favored weapon, and behold! Your monotheistic deity is ready for use! Maybe the monotheistic deity grants all domains, or maybe only some of them. Other domains might be granted by saints, angels, demons, spirits, or even genies, if you want.